Well, I just finished the installation of the battery and wiring in my new PA 14 for the Lowrance Elite 5 DSI. I used the rear hatch and gear bucket method for battery mounting; I know Hobie makes a battery holder now, but I wanted the bucket and lid for additional water-tightness.

The You Tube video http://www.youtube.com/watch?v=7-zDrsLfz-M showing the transducer installation was very helpful, but it took me a little while to figure out that I had to extend the power wiring from the front of the kayak (where the Lowrance connector comes out) back to the hatch where the battery is. I used a length of 18/2 wire for the extension, and butt connectors and heat-shrink to make the connections. I got all the electrical at West Marine; they had everything in the store except for the waterproof feed-thru connector at the gear bucket, which I got from their web store. I'll post a bunch of pics through Tapatalk in a little bit.